X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=drivers%2Frtc%2Fm41t62.c;h=3829bc54eb8c0c08777e59a7d523c658fb9a8f97;hb=8e7083fc95774017dba66cff85918ba9f0d0f12b;hp=cf2a9574a98f146fd19a7c114fa7727e84b06a1f;hpb=01026a6e613e1cfe580122fb5350677025f896fa;p=u-boot

diff --git a/drivers/rtc/m41t62.c b/drivers/rtc/m41t62.c
index cf2a9574a9..3829bc54eb 100644
--- a/drivers/rtc/m41t62.c
+++ b/drivers/rtc/m41t62.c
@@ -5,20 +5,7 @@
  * based on a the Linux rtc-m41t80.c driver which is:
  *   Alexander Bigga <ab@mycable.de>, 2006 (c) mycable GmbH
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
- * MA 02111-1307 USA
+ * SPDX-License-Identifier:	GPL-2.0+
  */
 
 /*
@@ -31,7 +18,6 @@
 #include <command.h>
 #include <rtc.h>
 #include <i2c.h>
-#include <bcd.h>
 
 #if defined(CONFIG_CMD_DATE)
 
@@ -64,11 +50,13 @@
 #define M41T62_FEATURE_HT	(1 << 0)
 #define M41T62_FEATURE_BL	(1 << 1)
 
+#define M41T80_ALHOUR_HT	(1 << 6)	/* HT: Halt Update Bit */
+
 int rtc_get(struct rtc_time *tm)
 {
 	u8 buf[M41T62_DATETIME_REG_SIZE];
 
-	i2c_read(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+	i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
 
 	debug("%s: raw read data - sec=%02x, min=%02x, hr=%02x, "
 	      "mday=%02x, mon=%02x, year=%02x, wday=%02x, y2k=%02x\n",
@@ -76,16 +64,16 @@ int rtc_get(struct rtc_time *tm)
 	      buf[0], buf[1], buf[2], buf[3],
 	      buf[4], buf[5], buf[6], buf[7]);
 
-	tm->tm_sec = BCD2BIN(buf[M41T62_REG_SEC] & 0x7f);
-	tm->tm_min = BCD2BIN(buf[M41T62_REG_MIN] & 0x7f);
-	tm->tm_hour = BCD2BIN(buf[M41T62_REG_HOUR] & 0x3f);
-	tm->tm_mday = BCD2BIN(buf[M41T62_REG_DAY] & 0x3f);
+	tm->tm_sec = bcd2bin(buf[M41T62_REG_SEC] & 0x7f);
+	tm->tm_min = bcd2bin(buf[M41T62_REG_MIN] & 0x7f);
+	tm->tm_hour = bcd2bin(buf[M41T62_REG_HOUR] & 0x3f);
+	tm->tm_mday = bcd2bin(buf[M41T62_REG_DAY] & 0x3f);
 	tm->tm_wday = buf[M41T62_REG_WDAY] & 0x07;
-	tm->tm_mon = BCD2BIN(buf[M41T62_REG_MON] & 0x1f) - 1;
+	tm->tm_mon = bcd2bin(buf[M41T62_REG_MON] & 0x1f);
 
 	/* assume 20YY not 19YY, and ignore the Century Bit */
 	/* U-Boot needs to add 1900 here */
-	tm->tm_year = BCD2BIN(buf[M41T62_REG_YEAR]) + 100 + 1900;
+	tm->tm_year = bcd2bin(buf[M41T62_REG_YEAR]) + 100 + 1900;
 
 	debug("%s: tm is secs=%d, mins=%d, hours=%d, "
 	      "mday=%d, mon=%d, year=%d, wday=%d\n",
@@ -96,7 +84,7 @@ int rtc_get(struct rtc_time *tm)
 	return 0;
 }
 
-void rtc_set(struct rtc_time *tm)
+int rtc_set(struct rtc_time *tm)
 {
 	u8 buf[M41T62_DATETIME_REG_SIZE];
 
@@ -104,34 +92,44 @@ void rtc_set(struct rtc_time *tm)
 	      tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_wday,
 	      tm->tm_hour, tm->tm_min, tm->tm_sec);
 
-	i2c_read(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
+	i2c_read(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE);
 
 	/* Merge time-data and register flags into buf[0..7] */
 	buf[M41T62_REG_SSEC] = 0;
 	buf[M41T62_REG_SEC] =
-		BIN2BCD(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f);
+		bin2bcd(tm->tm_sec) | (buf[M41T62_REG_SEC] & ~0x7f);
 	buf[M41T62_REG_MIN] =
-		BIN2BCD(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f);
+		bin2bcd(tm->tm_min) | (buf[M41T62_REG_MIN] & ~0x7f);
 	buf[M41T62_REG_HOUR] =
-		BIN2BCD(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ;
+		bin2bcd(tm->tm_hour) | (buf[M41T62_REG_HOUR] & ~0x3f) ;
 	buf[M41T62_REG_WDAY] =
 		(tm->tm_wday & 0x07) | (buf[M41T62_REG_WDAY] & ~0x07);
 	buf[M41T62_REG_DAY] =
-		BIN2BCD(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
+		bin2bcd(tm->tm_mday) | (buf[M41T62_REG_DAY] & ~0x3f);
 	buf[M41T62_REG_MON] =
-		BIN2BCD(tm->tm_mon + 1) | (buf[M41T62_REG_MON] & ~0x1f);
+		bin2bcd(tm->tm_mon) | (buf[M41T62_REG_MON] & ~0x1f);
 	/* assume 20YY not 19YY */
-	buf[M41T62_REG_YEAR] = BIN2BCD(tm->tm_year % 100);
+	buf[M41T62_REG_YEAR] = bin2bcd(tm->tm_year % 100);
 
-	if (i2c_write(CFG_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE))
+	if (i2c_write(CONFIG_SYS_I2C_RTC_ADDR, 0, 1, buf, M41T62_DATETIME_REG_SIZE)) {
 		printf("I2C write failed in %s()\n", __func__);
+		return -1;
+	}
+
+	return 0;
 }
 
 void rtc_reset(void)
 {
+	u8 val;
+
 	/*
-	 * Nothing to do
+	 * M41T82: Make sure HT (Halt Update) bit is cleared.
+	 * This bit is 0 in M41T62 so its save to clear it always.
 	 */
+	i2c_read(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
+	val &= ~M41T80_ALHOUR_HT;
+	i2c_write(CONFIG_SYS_I2C_RTC_ADDR, M41T62_REG_ALARM_HOUR, 1, &val, 1);
 }
 
 #endif